公众的ActionResult保存（HttpPostedFileBase文件）

公众的ActionResult保存（byte []的数据）
{
    //希望我可以在这里再构造HttpPostedFileBase的一个实例
    返回保存（文件）;

    //而不是写了很多类似codeS的
}
 

解决方案

创建一个派生类，如下所示：

 类MemoryFile：HttpPostedFileBase
{
流流;
字符串的contentType;
字符串文件名;

公共MemoryFile（流流，字符串的contentType，字符串文件名）
{
    this.stream =流;
    this.contentType的contentType =;
    this.fileName =文件名;
}

公众覆盖INT CONTENTLENGTH
{
    {返回（INT）stream.Length; }
}

公共重写字符串的ContentType
{
    {返回的contentType; }
}

公众覆盖字符串文件名
{
    {返回文件名; }
}

公共覆盖流的InputStream
{
    {返回流; }
}

公众覆盖无效另存为（字符串文件名）
{
    使用（var文件= File.open方法（文件名，FileMode.CreateNew））
        stream.CopyTo（文件）;
}
}
 

现在，你可以通过这个培训班里HttpPostedFileBase预期的实例。

Currently I have a byte[] that contains all the data of an image file, just want to build an instance of HttpPostedFileBase so that I can use an existing method, instead of creating a new overload one.

public ActionResult Save(HttpPostedFileBase file)

public ActionResult Save(byte[] data)
{
    //Hope I can construct an instance of HttpPostedFileBase here and then
    return Save(file);

    //instead of writing a lot of similar codes
}

Create a derived class as follows:

class MemoryFile : HttpPostedFileBase
{
Stream stream;
string contentType;
string fileName;

public MemoryFile(Stream stream, string contentType, string fileName)
{
    this.stream = stream;
    this.contentType = contentType;
    this.fileName = fileName;
}

public override int ContentLength
{
    get { return (int)stream.Length; }
}

public override string ContentType
{
    get { return contentType; }
}

public override string FileName
{
    get { return fileName; }
}

public override Stream InputStream
{
    get { return stream; }
}

public override void SaveAs(string filename)
{
    using (var file = File.Open(filename, FileMode.CreateNew))
        stream.CopyTo(file);
}
}

Now you can pass instance of this class where HttpPostedFileBase is expected.